Pump up the (sales) volume: Best Week Ever for 18 Gramercy Park

Everything you love: people dig a good throwback, and the Zeckendorf/Robert A.M. Stern dream team behind 15 Central Park West has struck platinum again, with six out of 16 units going into contract last week, according to Olshan Realty’s Luxury Market report. All six deals at the former Salvation Army residence for women were above $14.5 million.

Everything you missed: The crown jewel of the condo conversion, a five-bedroom duplex penthouse, sold earlier this month to Houston Rockets owner Leslie Alexander for the full asking price of $42 million. The deal marks the most expensive apartment ever sold downtown (south of 59th Street, to be precise), according to Miller Samuel president Jonathan Miller. The building first went on the market Sept. 4.

All the stuff you need to see again: Half of the expensive/expansive apartments (every unit measures at least 4,200 square feet, with an average asking price of $17.5 million) are up for grabs. A floor-through on the 15th level will set you back $18.75 million, which is a whopping $900,000 more than the $17.8 million asking price for the same unit last week, according to the New York Observer. Some of the other units, including the least stratospherically priced maisonette at $9.25 million, have yet to debut on the market.

Below is the floor plan for identical 3rd-floor and 6th-floor apartments, followed by a 15th-floor unit also up for sale.